Create a course with a student Add a Quiz and add some questions to it. As admin, enable "Mobile services": Plugins ► Web Services ► Mobile Create a Token for the student user. Click on Site administration ► Plugins ► Web services ► Manage tokens As the user start and attempt of the quiz. Next, you can do a CURL REST call simulating a WS client with the student user. You need to replace the wstoken and the URL of your moodle instance. You may also change qubaid, questionid, qaid, slot and newstate. To calculate the new checksum use an md5 generator with the following template: qubaid_usersecret_questionid_qaid_slot . Usually usersecret is empty. curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'wsfunction=core_question_update_flag&qubaid=1&questionid=1&qaid=1&slot=1&checksum=01b16b432969d727271ce46f60fbd868&newstate=1&wstoken=58705f1bb678fdbf57bdef94798830a5' --compressed Confirm that you receive the data of that request. Check that the question has been flagged. You can also check newstate to 0 and check that has been unflagged.